Fire-alarm.



F. E. OVIEDO.

FIRE ALARM.

APPLICATION rum) JULY 2,1909.

Patented Aug. 16,1910

UNITED STATES PATENT OFFICE.

FRANcisoo E. ovrnno, or MEXICO, MEXICO.

FIRE-ALARM.

To all whom it may concern:

Be it known that I, FRANCISCO E. Ovlnno, a citizen of the United MexicanStates, residing in tlle city of Mexico, Federal District, UnitedMexican States, have invented certain new alld useful Improvements in Fire-Alarms, of which the following is a specification.

This invention relates to improvements in automatic fire alarms.

The object of the invention is to provide a weight suspended by cords orthe like, held ill position by suitable material, which when heated willmelt and allow the weight to fall, whereby an electric circuit is closedto operate a signal, and indicate the location of the fire.

The invention also relates to the specific details of construction andarrangement to be hereinafter referred to and particularly pointed outill the claims.

In the drawings: Figure l is a perspective view of my invention, thewiring, etc, being conventionally indicated. Fig. 2 is a view of theunderside of the invention; Fig. 3 is a detail section illustrating theposition of the contact pieces. Fig. 4; is a detail perspective view insomewhat diagrammatic form illustrating one of the signals and itsconnections.

1 indicates a block or other base, provided with a screw 2, by means ofwhich said block may be attached to a ceiling or other support. Locatedon the upper side of the base are two contact pieces 3 and 4-, eachhaving an angularly disposed end 5. Normally slightly spaced from theextensions 5 are two other yielding contact pieces 6 and 7 having bentends which extend through openings 9. To the end of each yieldingcontact is secured a chain or cord 8. The lower end of each of the cords8 is secured to a weight 15.

Depending from the bottom of the base, near the edge thereof, are hooksl1, and at a point near the center is an eye or guide 12. The hooks 11support a light cord or wire 13, secured thereto by wax, or somesuitable substance, indicated at 14. From the hooks the wire or cordpasses through eye 12, and

at the lower end is attached the weight 15.

hen the cord or wire 13 is properly secured to the hooks, its lengthfrom the guide 12 to the weight is less than the length of the chains orcords 8, hence the latter remain slack and the pull on the ends of thecontact Specification of Letters Patent. Patented Aug; 16, 1910,Application filed July 2, 1909.

Serial No. 505,690.

pieces 6 and 7 is relieved and the circuit remains broken. The yieldingcharacter of the contact pieces 6 and 7, is such as to cause them tospring upwardly from the angular ends 5 of the contact pieces 3 and 4;,when the pull of the weight is relieved.

Connected to the end of contact 3, is a wire 29 leading to a bell 21.From the bell leads a wire 22, connected to a magnet 23, and from themagnet leads a wire 24, connected to a battery 25. From battery 25,leads a wire 26, connected to the terminal of the contact piece 6. Asimilar connection may lead from the complemental contact pieces a and7, if desired.

The armature 30, which cooperates with the magnet 23, controls a drop31, located over an indicating sign 33, having the word Fire thereon. Tothe end of the drop is a short connection 31, supporting a trip 35, toengage a clock mechanism 36, to indicate the time of the fire. The dropalso has a contact piece 38, designed to contact with a contact piece39, when a fire occurs. To the contact 39, is attached a wire leading toan electric lamp 10. wire 41, connected to a battery 41, and from saidbattery leads a wire 42, connected to the contact piece 38.

If a fire should occur in the room where the block or base 1 is located,the wax or other substance 1 1 holding the cord 13 to the hooks 11, willmelt and immediately the cords will be free to be drawn from the hooksand the guide 12, by the weight 15. When the weight falls, the chains orcords 8, attached to the contact pieces 6 and 7, will draw the latterdown into contact with the angular portions 5 of the contact pieces 3and 4, and thereby establish the circuit through the wiring described.WVhen the circuit is closed, the bell 21, not only rings, but the shield31, drops and exposes the sign With the word F ire thereon. The droppingof the shield completes the circuit through the contacts 38 and 39, andthe electric lamp 40, is lighted. The dropping of the shield allows thetrip 35 to drop and thereby indicates through the clock mechanism justthe time the fire occurred.

It will of course be obvious the various alarms, and signals may belocated in various rooms, or places according to the condi tions andcircumstances.

It may be found convenient to use a single cord 13, around the hooks 11,or several such From the lamp leads a cords may be employed, accordingto the tacts together and close the circuit and ap circumstances.

The essential feature of the invention resides in the particular mannerof arranging the contacts, and the means for holding the cords so thatthe weight will under normal conditions keep the circuit broken, butwill, when released by the melting of the sub stance holding the cords,close the circuit and announce through the various signals the time andplace of the fire.

Claims 1. In a fire alarm signal, the combination with a base, a guideon the base, hooks supported by the base, a cord supported by the hooksand extending through the guide on the base, a fusible substance forholding the cord on the hooks, a weight supported on the said cord, apair of normally spaced contacts mounted on the base, a flexibleconnection between one of the contacts and the weight, a circuit leadingfrom the contacts, and a signal in the circuit, whereby when a fireoccurs the fusible substance holding the cord on the hooks will melt:and the weight will drop by gravity and will-bring the conerate thesignal.

2. In a fire-alarm signal, the combination with a base formed with anopening, a cord secured to the base by a fusible substance which willmelt and release said cord under the influence of heat, a weight securedto the cord, a contact secured to the base and having one end extendedacross the opening, a second contact secured to the base and extendingover and spaced from the part of the first mentioned contact whichextends across the opening, the end of the second mentioned contactbeing bent and extending through the opening in the base, a flexibleconnection between the bent end of the second contact and the weight, asignal and wiring between the contacts and the signal, whereby when afire occurs the fusible substance will melt and release the cord andweight and the contacts will close the circuit and operate the signal.

FRANCO. E. OVIEDO.

Witnesses HERACLIO G. CRUZ, 1 HINPHEN.

